108 Mr. J. S. Baly on new Genera 



XII. — Description of a new Sp>ecies of Didelphys from Deme- 

 rara. By Dr. Albert Gunther, F.R.S. 



The British Museum has recently received from one of its 

 correspondents in Demerara, the Rev. W. Y. Turner, a small 

 opossum, which resembles Didelphys crassicaudata in the 

 general form of the body, structure of the hair, and relative 

 length and hairiness of the tail, but which is only half the 

 size of that animal, aud, besides, distinguished from all other 

 opossums by having eight incisors only in the upper jaw. It 

 seems to be undescribed, and may be named 



Didelphys Turneri. 



The muzzle is of moderate length and rather pointed ; ears 

 short, nearly naked, partially clothed with small hairs on the 

 inside ; fur of the head, body, and tail a little harsh, not 

 woolly; tail rather shorter than the head and body taken 

 together, with the basal third clothed with fur like that on the 

 body, the remaining portion with short hairs. Colour uniform 

 brown tinged with greyish, lower parts light brownish grey ; 

 hairs of the scrotum dark orange-coloured ; the terminal two 

 thirds of the tail black, with white apex ; feet short. 



in. lin. 



Length from tip of nose to root of tail 9 



Length of tail 8 3 



Length from nose to ear 2 



Length of hind foot 1 4 



Length of skull 2 



Width of skull 1 



Length of nasal hones 8| 



Length of palate 1 1 



Width of palate hetween the posterior molar teeth 4 



The specimen is an adult male. 



XIII. — Descriptions of new Genera and Species of Galle- 

 rucinas. By Joseph S. Baly, F.L.S. 



[Continued from vol. iii. p. 84. J 



Agelastica humeralis. 



A. ovalis, convexa, rtifo-fulva, nitida, labro, oculis, antennis, geni- 

 bus, tibiis tarsisque nigris ; thorace bifoveolato, termissime punc- 

 tata ; elytris apice paullo dehiscentibus, crebre punctatis, viridi- 

 cyaneis, utrinque macula humerali rufo-fulva ornatis ; abdomine 

 (apice excepto) nigro-cyaneo. 



Long. 3-3^ lin. 



Hah. Moreton Bay. 



